package org.example.reggie.controller;

import lombok.extern.slf4j.Slf4j;
import org.example.reggie.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@Slf4j
@RequestMapping("/common")
public class Commontroller {

    @Value("${reggie.path}")
    private String basepath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){

        String originalFilename = file.getOriginalFilename();
        String substring = originalFilename.substring(originalFilename.lastIndexOf("."));

        String filename = UUID.randomUUID().toString() + substring;

        File file1 =new File(basepath);//判断目录是否存在
        if(!file1.exists()){
            file1.mkdirs();
        }

        try {
            file.transferTo(new File(basepath+filename));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return R.success(filename);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){


        try {
            //获取输入流，读取文件
            FileInputStream fileInputStream = new FileInputStream(new File(basepath + name));

            //获取输出流
            ServletOutputStream outputStream = response.getOutputStream();

            //设置返回文件的类型
            response.setContentType("image/jpeg");

            byte[] bytes = new byte[1024];

            int len=0;
            while((len=fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
